<div class="nav_menu">
  <el-tree :data="treeData"  :props="defaultProps" @node-click="handleNodeClick"   id="dragtarget"  @click.right="rightMenu($event)" />
  <div v-if="isPop" class="pop" :style="{'left':mouse.left+'px','top':mouse.top-10+'px'}">
    <DropDown>
    </DropDown>
  </div>
</div>